Racks are measured in rack units (RU or U) with the industry standard being 42U tall — about 6 feet. ^ Demarest, Charles S. (July 1923). "Telephone Equipment for Long Cable Circuits". Bell System Technical Journal. Vol. 2, no. 3.

2022年3月3日 · What Does ‘RU’ Mean in Server Racks? One of the fundamental concepts in server racks is the “rack unit,” abbreviated “RU” or just “U.” When you go to buy a rack or cabinet, its height will be specified by the number of U’s. How Big Is a Rack Unit? One rack unit (RU) is equal to 1.75 inches (44.45mm).

2017年4月24日 · Sometimes people refer to rack units as RU (ex: 1RU, 2RU, 6RU), but this has mostly been phased out over time in favor of the simpler “U”. On most modern racks, the rack units will be visibly labeled with numbers and lines (generally white on …

2024年5月5日 · 服务器1RU是指一种标准的服务器架构尺寸，RU即是"Rack Unit"的缩写，意为"机柜单元"。每个RU的高度为1.75英寸（约为44.45毫米），用来衡量服务器在机架中的占用空间。 1RU的服务器通常用于机柜中，可以被安装在标准的19英寸宽度的机架上。

Includes a 4RU DIN rail mount bracket, 48-port patch panel, UPS, power supplies AC to DC, terminal blocks, and wiring for 120 V AC input.

RU和U是一样的，正式说法就是“RU“，通常简称：U1RU＝1.72英寸＝4.36厘米_4ru等于多少mm.

2024年5月5日 · 3u（3ru）表示设备的高度为5.25英寸（3ru x 1.75英寸/1ru = 5.25英寸）。 设备的RU数越高，它在机柜中所占据的空间就越大。 RU数的选择通常取决于设备的功能、配置以及所需的安装空间。

Tellabs Optical LAN is a true enterprise-centric solution that offers an alternative means of designing and operating local area networks. Optical LANs minimize the distance constraints of legacy copper LANs and deliver increased network performance.

IDF Wallmount Rack provides a lockable cabinet with a 8RU rack and an exposed 2RU rack for use in an intermediate distribution frame (IDF) closet at a customer premise or central office. The rack can be oriented so that the lockable cabinet is on the bottom or top and a Wallmount DPP can be attached to the left, right, top, or bottom side.